Nutsch filter



March 6, 1928.

J. E. iJEWETT NuTscH FILTER INVENTOR @snow E Jwrr dalla WM TORNEY Filed April B. 1927 Patented Mar. 6, 1928.

UNITED STATES PATENT OFFICE.

JOSEPH E. JEWETT, F BUFFALO, NEW YORK, ASSIGNOB TO NATIONAL ANILINE 8 CHEMICAL COHPANY, INC., 0F NEW YORK, N. Y., A CORPORATION OF NEW YORK.

NUTBCII Application nl ed April 8,

This invention relates to filtering devices of the class known as Nutschor suction filters in which liquid contained in a slurry passes or is drawn through a filtering medium supl ported by a suitable means over a collecting chamber for the liquid, while precipitate or cake is separated and deposited on the medlum. More articularly it relates to the con- .struction ofJ filtering devices of this character which are adapted for the treatment of slurries containing acids. It also includes a novel form' of filter flooring combining the functions of a supporting means for the filtering medium and collecting channels for the filtrate, and formed of a novel type of filtering tile.

The presence of acids, as a rule 1n corumercial practice, demands lead linin or its equivalent of all parts which may e c on- W tacted thereby. But the filtering medium requires support for the material carried by it and the added suction load, as well as its own weight, and accordingly the usual Nutsch construction provides members conu nected to the sides of the container to transmit the load thereto. It is impractical to attempt the application of a non-adhering lead lining or sheathing to the structural elements required for this purpose because of the difficulty in fitting and holding the lining to the elements due to the vacuum employed.

The present invention provides a construction whereby it is practically feasible to use lead or its. equivalent for lining tanks of any desired capacity of wood, iron, steel or other construction without perforating or sub- 'ecting such a lining to the danger of collapse, while supplying the necessary collecting chamber for the filtrate and an adequate support for the filtering medium. This is accomplished by .omitting the usual side ivall supports for the filtering medium, thus providing a tank free from protuberances or obstructions that interfere with lining the tank, and placing within the container, after lining, a construction that combines the functions of a collecting chamber with that of supporting the filtering medium. This 5 construction comprises a flooring for the tank made of tile of such a shape that there is sufficient contact surface to support a superposed tilterin medium Without interference with the tering operation or the FILTER.

1927. Serial No. 181,998.

collection and removal of filtrate.

A preferred embodiment ofthe invention is illustrated in the accompanying drawing in which Fig. 1 is a plan view of a filter-,ia portion of the filtering medium being removed to show the disposition of the tile forming the flooring;

Fi 2 is an enlarged vertical section on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged vertical section on the line 3-3 of Fi 1;

Fig. 4 is a side evation of a single tile;

Fig. 5 is an end view of the tile; and

Fi 6 is an end view of a modified form of ti e.

Acontainer 10 of any desired shape, eapacity, and material as for example steel, and preferably free from projections on the interior, has a lining 11 of lead, rubber or' other equivalent. This lining covers the bottom 12 and sides 13, and the absence of projections avoids manipulation and dangers of exposure of the non-acid-resisting material beneath as Well as the requirement of maintaining the lining in lace over such pro jections. About the inner periphery and upon the bottom lining vof the container there is fitted a member 14 providing a channel or drainage space 15, between up er and lower flanges 16 and 17, open to the interior of the container. The member 14 may be of any suitable material, such as lead, lead or rubber covered steel, or the like. Bolts 18 extend upwardly from upper flange 16, spaced at suitable distances, for engaging the edge of a screen 19 and filter cloth 20. A fiat ring 21 engages the bolts and the filter cloth, and nuts 22 on the bolts draw the ring in close engagement with the cloth. The bolts and ring may be of any suitable metal such as aluminum bronze. Within the space bounded by the member 14, the screen 19 and the bottom 12, there is distributed tile 23 having the configuration shown in Fig. 3, 4 and 5, thus forming a flooring that rests on the bottom and supports the screen p and filter cloth.

Each tile comprises a substantially rectangular block or plinth 24 which in vertical p0 sitiou has an upper edge 25, a lower ed e 28, sides 27 and 28 and ends 29 and 30. From one side 27 there extends a continuous ree' tangular abutment 31 which is Hush with the lower edge 26, and from the saine side but adjacent or flush with the upper edge, there are spaced nodules, projections or protuberances 32, of spherical, cylindrical, or any other suitable shape, and extending substantially the saine distance as the abutment from the block. The upper edge is formed with a longitudinal groove 33 and a cross groove 34 at one corner. As shown in Fig. 5 there can be a plurality of channels or Corrugations as 33', and the cross channel 34 can also be duplicated. Perforations 35 pass through the block and are preferably stagered with relation to the protuberances and ush with the u per face of the abutment. When these blocllils are assembled within the tank, the abutments 31 in Contact with the adjacent blocks provide a substantially continuous floor 36 resting on the bottom lining from which floor there extends the upper ortion of the blocks in rows 37 held apart E the protuberances 32, thus providing c annels 38. These channels are transversely connected by the perforations 35, and the cross grooves 34 connect the longitudinal grooves 33 with the channels. Drainage is thus provided in all directions to the peripheral member 14.

An outlet 40 projects from the channel member through the wall of the container. It consists of a nipple 41 havin a flanged end 42 within the channel mem r 14 and a nut 43 threaded on the outer end to draw the flanged end into tight engagement with the member. The nipple may be of iron, lead covered, or other suitable construction. It is obvious that if member 14 be made of lead the nipple 41 may also be made of lead and attached solidly to member 14 by burning the joint.

The filter constructed as above described, is useful with any type of slurry and operates in a manner similar to filters of the Nutsch type. The tank is charged with the slurry and the filtrate travels through the filter cloth and screen into the channels 38 maintained between the blocks. These channels a'ord ample collecting space for filtrate, while at the same time the blocks are close enough to give an adequate and-substantially kin said bottom from wall and bottom obstructions; a lining for the walls and bottom of the tank; a peripheral member on the bottom of the tank, said member having up er and lower flanges extending inwardly anclformin a draina e space open to the interior of tie tank; t1 e distributed throughout the space bounded by the member, said tile having a confi uration providing in assembly a substantia ly continuous surface in contact with the bottom lining, a substantially uniform sup ortin surface for a filterin medium and ciianne s leading to said mem er; a filtering medium on said tile and said member; means for securing said medium to the upper flange of aid member; and an outlet from said mem- 2. A tile for supporting a filtering medium w`thin a tank comprising in combination a substantially rectangular block having substantially parallel sides and a corrugated top; and a continuous abutment extendin from one of the sides the length of said block and flush with the bottom of said block, the side of said abutment being substantially parallel with the sides `of said block.

3. A tFle for supporting a filtering medium within a tank com rising in combination a block with substantially rectangular parallel sides, a. continuous abutment of rectangular shape extending from one of the sides and" flush with one edge of the block, and spaced spherical protuberances extendin from the same side but' adjacent the o posite edge of the block, said opposite edge avin a longitudinal groove in its surface and a cross lgroove at one corner of the block, said block aving perforations extendin from one side to the other flush with said a utment and in staggered relation with respect to said protuberances.

4. A tile for supporting a filtering medium formed of vitreous material and having a flat bottom portion; a relatively narrow to portion, havin a channel therein; and si es connect-.in t e to and bottom portions, one of said sides Joining said bottom portion at one ed e, and the other of said sides joining said ttom portion at a int intermediate the two bottom edges, sai first mentioned side and the opppte 'edge 1 of bottom portion being su tially para e 5. A tile for supporting a filferin medi umY formed of vitreous material"l dgha a Bat bottom portion; a. relatively narrow top portion, having a channel therein; substantially parallel sides connecting the and bottom portionsz one of said sides 'oinrtion at one edge, an the ot er of said si es joining said bottom portion at agoint intermediate two bottom edges, soi first mentioned side and the o posits odge of said bottom portion being su lo ing ot erl'of said sidesjoining said bottom portion a block with substanti stantially parallel; and said block having a perforation running through said tile connecting said sides.

6. A tile for supporting a filtering medium formed of vitreous material and having a llat bottom portion; a relatively narrow top portion, having a channel therein; substantially parallel sides connecting the top and bottom portions, one of said sides joinsaid bottom portion at one edge, and the tion at. a point intermediate the two bottom edges, said first m'entioned side and the opposite ed e of said bottom portion being substantiaglly parallel; and a nodule on said second mentioned side.

7. A tile for supporting a filtering medium formed of vitreous material and having -a flat 'bott/om.portion;A a relatively narrow f tion at a point interme iate the two bottomedges, said first mentioned side and the op 'te edge of said bottom portion being su `antially parallel; and a nodule on said second mentioned side; said block having a perforation connecting the said two sides, said perforation contacting said bottom por'- tion at its u per surface.

8. A tile or supporting a liltering medium within a tank eolnprisin in. combinay rectan ular parallel sides, a continuous abutment o rectangularshape extending from one of the sides and flush with one edge-of the block, and spaced spherical protuberances extending from the same side' but adjacent the opposite edge of the block,'said opposite edge having a longitudinal groove in its surface anda cross ve at one corner of the block, said block aving perforations extend' from one side to the other flush with sai abutment. v v

9, A filter lloor for supporting a filtering medium comprising in combination tiles having a flut bottom portion, a relatively narrow top, parallel inner and outer sides the outer of which joins the outer edge o vsaid top to said bottom )ortion at one edge and the other of which )oius the inner edge of said top to said bottom portion at a point intermediate the bottom' edges therev forming a ledge, said bot-tom edges being parallel, a longitudinal channel formed in said 'to i, amd nodules on the inner sides; said tilesy ing placed side by side and end to end, whereby a continuous floor is formed by the bottoms of said tilesrbctween walls of adjacent tiles.

l0. A tilter door for supporting a filtering medium comprising tiles laid slde by side and end to end, said tiles having substantially rectangular parallel sides joining a top rtion and a bottom portion, said portions .ing substantially' parallel, said top portion having a longitudinal groove, and said bot- JOSEPH E. JEWETT.

noemen stantially parallel; and said block having a perforation running through said tile connecting said sides.

6. A tile for supporting a filtering 1nedium formed of vitreous material and having a flat bottom portion; a relatively narrow top portion, having a channel therein; substantially parallel sides connectin" the top and bottom portions, one of said sides joining said bottom portion at one edge, and the ot er of said sides joining said bottom portion at a point intermediate the two bottom edges, said first m'entioned side and the opposite ed e of said bottom portion being substantia ly parallel; and a nodule on said second mentioned side.

7. A tile for supporting a filtering nicdium formed of vitreous material and having a flat 'bottom4 portion; a relatively narrow top portion, having a channel therein; substantially parallel sides connecting the top.

and bottomportions. one of said sides oinin said bottom Jortion at one edge, an the ot er of said si es joinin said bottom portion at a point interme iate the two bottom. edges, said first mentioned side and the opposite edge of said bottom portion being substantially parallel; and a nodule on said second mentioned side; said block having a perforation connecting the said two sides, said perforation contacting said bottom portion at itsV u per surface.

'8. A tile En' supporting a lfiltering medium within a tank comprisin inV combination a block with substanti y rectan ular parallel sides, a continuous abutment o rectangular shape extending from one of the -sides and flush with one edge-of the block, and spaced spherical protuberances extending from the same side but adjacent the oppositie edge of the bloek,'said opposite edge having a longitudinal groove in its surface anda cross roove at one corner of the block, said block aving perforations extendin from one side to the other fiush with sai abutment.

9. A filter floor for supporting a filtering medium comprising in combination tiles having a fiat bottom portion, a relatively narrow top, parallel inner and outer sides, the outer of which joins the outer edge of said top to said bottom oi-tion at one edge und the other of which ]oins the inner edge of said top to said bottom portion at ay having a longitudinal groove, and said bottom portion extending beyond th'e inner side and forming a ledge, the edges of said bottom portions being substantially parallel, nodules onv the inner side of said tiles adjacent the top thereof project-ing about the same distance from said side as said ledge, and said tiles having perforations connecting the sides, the lower edges of said perforations being contiguous to the upper surface of said ledge.

In testimony whereof I allix my signature.

JOSEPH E. JEWETT.

murmur or connection.

mm m 1,661,290.

Granted March 6, im to mania 1mm.

lt is hereby certified that errar appears in the printed specification of the :have mineral patent regairilg correction u follows: Page-2, line 6 4, elail', after the 'mi "hatten" inert a ell-a and the word ud'; page 3, Ille $8, einig 9. for Athe d "aides" read-"aide" ad line 72, chin l0. ier the wird "mom" mi "pmu-"g .l im ne u mam me.: mld l ma with then corrections therein that the alle lay malor-4 to the record of the v cue il `the Patent Office. l

Signed nl sealed this 29th da! of la. A. D. im

l. J. leere, Actin Ce-iaaioaeroi l'ateata.

CERTIFICATEOF CORRECTION.

Ps'tent No. 1,661,290. lGranted March 6, i928. to

1081134115.'V IEUETT.'

Ignis hereby certified that ermr s ppess in the printed speefeatiou'V of the shove numbered patent eqnrvng correction as follows; Psg'e, line 6.4,'elam l, after the Vword ."rbotto" insert .lemma and-the @rd snd".; page 3, eline $8., cllm 9.. for the mrd' '.sdes". reid- "sde md line 72, elsim 10, ior'fthe mrfprfloss" res-'lfos end that :the said Letters Patent should be reu'l wm these coi-rectum tieren tht che me mi mfom 'mths 'record or che esse-inthe Patent Mike, Y s

Signed und sealed thll29tll dl'yfof Bay', A. D.- B28.

Il. J. Mooie, 

